1 files changed, 77 insertions, 0 deletions
diff --git a/src/bin/fstpush.cc b/src/bin/fstpush.cc
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+++ b/src/bin/fstpush.cc
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+// fstpush.cc
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Copyright 2005-2010 Google, Inc.
+// Author: riley@google.com (Michael Riley)
+// Modified: jpr@google.com (Jake Ratkiewicz) to use FstClass
+// \file
+// Pushes weights and/or output labels in an FST toward the initial or
+// final states.
+
+#include <fst/script/push.h>
+
+DEFINE_double(delta, fst::kDelta, "Comparison/quantization delta");
+DEFINE_bool(push_weights, false, "Push weights");
+DEFINE_bool(push_labels, false, "Push output labels");
+DEFINE_bool(remove_total_weight, false,
+            "Remove total weight when pushing weights");
+DEFINE_bool(remove_common_affix, false,
+            "Remove common prefix/suffix when pushing labels");
+DEFINE_bool(to_final, false, "Push/reweight to final (vs. to initial) states");
+
+
+int main(int argc, char **argv) {
+  namespace s = fst::script;
+  using fst::script::FstClass;
+  using fst::script::VectorFstClass;
+
+  string usage = "Pushes weights and/or olabels in an FST.\n\n  Usage: ";
+  usage += argv[0];
+  usage += " [in.fst [out.fst]]\n";
+
+  std::set_new_handler(FailedNewHandler);
+  SetFlags(usage.c_str(), &argc, &argv, true);
+  if (argc > 3) {
+    ShowUsage();
+    return 1;
+  }
+
+  string in_name = (argc > 1 && strcmp(argv[1], "-") != 0) ? argv[1] : "";
+  string out_name = argc > 2 ? argv[2] : "";
+
+  FstClass *ifst = FstClass::Read(in_name);
+  if (!ifst) return 1;
+
+  uint32 flags = 0;
+  if (FLAGS_push_weights)
+    flags |= fst::kPushWeights;
+  if (FLAGS_push_labels)
+    flags |= fst::kPushLabels;
+  if (FLAGS_remove_total_weight)
+    flags |= fst::kPushRemoveTotalWeight;
+  if (FLAGS_remove_common_affix)
+    flags |= fst::kPushRemoveCommonAffix;
+
+  VectorFstClass ofst(ifst->ArcType());
+
+  if (FLAGS_to_final) {
+    s::Push(*ifst, &ofst, flags, fst::REWEIGHT_TO_FINAL, FLAGS_delta);
+  } else {
+    s::Push(*ifst, &ofst, flags, fst::REWEIGHT_TO_INITIAL, FLAGS_delta);
+  }
+
+  ofst.Write(out_name);
+
+  return 0;
+}